SSL/TLS Certificate Lookup

Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted

SSL/TLS Certificate for 12steg.se

Expired
Issued by (CA)
Google Trust Services
Subject
12steg.se
Valid from
Feb 24, 2025
Valid until
May 25, 2025 (expired 446 days ago)
Public key
RSA 4096-bit
Serial
A1E986683A3F142D0E19E718740842DD
SHA-256 fingerprint
87:CE:09:07:67:94:CF:93:29:E9:1B:04:33:04:18:CE:88:E4:D2:5F:ED:94:97:FC:3D:1F:97:1D:8D:2A:6D:E2
Chain
WR1 → GTS Root R1
Subject Alternative Names (1)
12steg.se

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.

Never get surprised by 12steg.se's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch 12steg.se continuously, notifying you the moment anything moves across all three signals:

Uptime

We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.

DNS changes

We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.

TLS certificate

We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.

Monitor this certificate free

Free for your first domain: uptime, DNS, and certificate together. No credit card.